/* nav */
.nav{
	margin-left: 50px;
}
.nav span{
	margin-left: 40px;
}

/* banner */
.banner{
	background-image: url(05盒子模型/banner.jpg);
	height: 400px;
	width: 100%;
	background-size: 100%;
	color: white;
	padding-top: 200px;
}
.banner span{
	font-size: 50px;
	margin-left: 100px;
	
}
.banner p{
	width: 300px;
	margin-left: 100px;
}
.banner b{
	font-size: 40px;
}

/*products  */
.products{
	border: 1px solid black;
	width: 80%;
	margin-left: 10%;
	 height: 420px; 
}
.item{
	width: 24%;
	float: left;
	margin-left: 0.7%;
	margin-top: 1%;
}
.item img{
	width: 100%;
}